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排序方式: 共有452条查询结果,搜索用时 343 毫秒
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Fumia Toki Associates Yokohama A.Higashide T.lida T.Sakal M.Yoshida K.Todoroki H.Hatakeyama T.Kawata Y.Kishimoto T.Yoshikunt M.Sato Nihon Sekkei Tokyo 刘畅 《建筑细部》2005,(4):56-57
乍看起来,大体量的日本关西国家图书馆并不是非常引人注目,该馆的馆藏能力达到2000万册,目前尚有大量空间可以利用,图书馆最初设在东京,但是由于首都地价过高,因此在那里进行扩建或是重修图书馆的工作是不可能的。 相似文献
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Yoshinobu Nakamura Takeshi Harada Hitoshi Kuribara Akira Kishimoto † Naobumi Motohira ‡ Hiroaki Yanagida § 《Journal of the American Ceramic Society》1999,82(11):3069-3074
A couple of zinc oxide (ZnO) single crystals with single boundaries (ZnO-ZnO single-contacts) are fabricated by the traditional vapor reaction method and their electrical properties are characterized. The ZnO-ZnO single-contacts obtained show nonlinear current-voltage ( I-V ) characteristics without varistor-forming constituents. Some of the ZnO-ZnO single-contacts show pronounced nonlinear I-V characteristics with negative resistance. The I-V characteristics of the ZnO-ZnO single-contacts are apparently similar to those of ZnO varistors; however, there are marked differences in the electric structure of the boundaries between the ZnO-ZnO single-contacts and ZnO varistors. The capacitance-voltage ( C-V ) relations of the ZnO-ZnO single-contacts are quite different from that of ZnO varistors and no evidence for the formation of double Schottky barriers at the boundary region are found. A very slow response to current stress is a feature of ZnO-ZnO single-contacts and it is suggested that any thermal processes including Joule heat would modify the carrier transport efficiency through the boundaries. 相似文献
107.
K. Akai T. Uemura K. Kishimoto T. Tanaka H. Kurisu S. Yamamoto T. Koyanagi K. Koga H. Anno M. Matsuura 《Journal of Electronic Materials》2009,38(7):1412-1417
We calculated electronic structures of Ba8Al16Ge30 in some Al-Ge framework configurations without nearest-neighbor Al-Al bonds by using a first-principles method. The calculated
band structures are similar in outline but different in detail. We also calculated thermoelectric properties by using the
electronic structures to analyze the experimental results on a sintered Ba8Al16Ge30 sample. The calculated properties nearly agree with the experimental results; however, the calculated temperature dependences
of electrical conductivity are slightly different from one another, because of differences in electronic structure. In this
paper, we discuss the temperature dependence from the viewpoints of nonparabolic band effects. 相似文献
108.
Eva Hemmer Hiroyuki Takeshita Tomoyoshi Yamano Takanori Fujiki Yvonne Kohl Karin L?w Nallusamy Venkatachalam Hiroshi Hyodo Hidehiro Kishimoto Kohei Soga 《Journal of materials science. Materials in medicine》2012,23(10):2399-2412
The use of an “over 1000-nm near-infrared (NIR) in vivo fluorescence bioimaging” system based on lanthanide containing inorganic nanostructures emitting in the visible and NIR range under 980-nm excitation is proposed. It may overcome problems of currently used biomarkers including color fading, phototoxicity and scattering. Gd2O3:Er3+,Yb3+ nanoparticles and nanorods showing upconversion and NIR emission are synthesized and their cytotoxic behavior is investigated by incubation with B-cell hybridomas and macrophages. Surface modification with PEG-b-PAAc provides the necessary chemical durability reducing the release of toxic Gd3+ ions. NIR fluorescence microscopy is used to investigate the suitability of the nanostructures as NIR–NIR biomarkers. The in vitro uptake of bare and modified nanostructures by macrophages is investigated by confocal laser scanning microscopy. In vivo investigations revealed nanostructures in liver, lung, kidneys and spleen a few hours after injection into mice, while most of the nanostructures have been removed from the body after 24?h. 相似文献
109.
Haruo Kishimoto Natsuko Sakai Katsuhiko Yamaji Teruhisa Horita Yue-Ping Xiong Manuel E. Brito Harumi Yokokawa 《Journal of Materials Science》2009,44(2):639-646
The stability of yttria-stabilized zirconia (YSZ) and scandia-stabilized zirconia (ScSZ) electrolytes against boron oxide
was examined. Boron oxide was painted on the polished surface of YSZ and ScSZ and annealed at 1273 K for 100 h under wet hydrogen
flowing condition. The X-ray diffractometry, scanning electron microscopy/energy dispersive X-ray analysis, and Raman studies
revealed that formation of Y2O3 and Sc2O3 occurred on YSZ and ScSZ surfaces contacting the boron oxide, but rare earth borates were not observed. The surface of electrolytes
around precipitated particles became rough and phase transformation was confirmed from the cubic to the tetragonal or the
monoclinic phases due to stabilizer removal from cubic zirconia. It has been also verified that small amounts of zirconium
and yttrium were transported from the electrolyte to the gas phase via boron component. This destabilization effect induced
by boron oxide was more serious for ScSZ than for YSZ. A destabilization mechanism under wet hydrogen atmosphere is proposed
based on pseudo ternary phase diagrams for the YO1.5–BO1.5–ZrO2 system and the ScO1.5–BO1.5–ZrO2 system and thermodynamic considerations. 相似文献
110.
The effects of high-voltage screening were examined for perpendicularly and parallelly surface-ground titania rectangular bars. A screening field at or below which 30% of titania samples break electrically was applied to each group samples. After high-voltage screening, the surviving samples were subjected to mechanical strength measurement and the resultant strength distribution was compared with the original distribution. After screening, Weibull plots of perpendicularly ground samples bent to become convex curves while plots in the high-strength region remained almost the same, indicating that low-strength samples were selectively eliminated by the high-voltage screening. On the other hand, the screening effect on parallelly surface-ground samples was very small. 相似文献